Numerical investigation of the flow characteristics in the vicinity of pressure conduit’s gates

سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 423

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شناسه ملی سند علمی:

LTBD04_045

تاریخ نمایه سازی: 25 آذر 1396

چکیده مقاله:

Bottom outlet is one of the related hydraulic structures of dams used to control initial water volume in reservoir and to help the spillways discharge capacity in floodwaters. Designed elements of bottom outlet such as control gates must be able to properly act to regulate downstream flow in entirely closed and semi-open situation. Bottom outlets which work with high heads, may create intense change in velocity and pressure field near the control systems (gates) by high velocity that probably causes cavitation phenomenon and unusual vibration on the structure’s wall and conduit to happen. In the present research, characteristics of the flow, such as momentary and average flow s pressure and velocity near the service gate, cavitation index and gate vibration frequency in reservoir normal head (100 m) at various service gate openings were extracted and analyzed using numerical model of Seymareh dam’s bottom outlet with FLOW 3D software and RNG(K-ε) turbulence model. The results of this research will help to appropriately understand the hydraulic phenomena occurred around outlet gates

نویسندگان

Mohammad Manafpour

Assistant professor, Department of Civil Engineering, Urmia University, Urmia, Iran

Tohid Jamali Rovesht

M. Sc. Student of Civil Engineering, Urmia University, Urmia, Iran